player/client_handler: return count for list-style responses

This is necessary to handle the case where the tracklist is empty,
clients get confused and timeout the response if we attempt to emit
an empty string.

1 files changed, 3 insertions, 2 deletions

diff --git a/lib/dtas/player/client_handler.rb b/lib/dtas/player/client_handler.rb
index 6070851..70d992b 100644
--- a/lib/dtas/player/client_handler.rb
+++ b/lib/dtas/player/client_handler.rb
@@ -567,9 +567,10 @@ module DTAS::Player::ClientHandler # :nodoc:
     when "get"
       res = @tl.get_tracks(msg.map! { |i| i.to_i })
       res.map! { |tid, file| "#{tid}=#{file ? Shellwords.escape(file) : ''}" }
-      io.emit(res.join(' '))
+      io.emit("#{res.size} #{res.join(' ')}")
     when "tracks"
-      io.emit(@tl.tracks.map! { |i| i.to_s }.join(' '))
+      tracks = @tl.tracks
+      io.emit("#{tracks.size} " << tracks.map! { |i| i.to_s }.join(' '))
     when "goto"
       track_id = msg.shift or return io.emit("ERR track_id not specified")
       offset = msg.shift # may be nil